2281451815 has 4 divisors (see below), whose sum is σ = 2737742184. Its totient is φ = 1825161448.

The previous prime is 2281451797. The next prime is 2281451819. The reversal of 2281451815 is 5181541822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5181541822 = 2 ⋅2590770911.

It is a cyclic number.

It is not a de Polignac number, because 2281451815 - 2²¹ = 2279354663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281451819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228145177 + ... + 228145186.

It is an arithmetic number, because the mean of its divisors is an integer number (684435546).

Almost surely, 2^2281451815 is an apocalyptic number.

2281451815 is a deficient number, since it is larger than the sum of its proper divisors (456290369).

2281451815 is an equidigital number, since it uses as much as digits as its factorization.

2281451815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456290368.

The product of its digits is 25600, while the sum is 37.

The square root of 2281451815 is about 47764.5455856119. The cubic root of 2281451815 is about 1316.4481754276.

The spelling of 2281451815 in words is "two billion, two hundred eighty-one million, four hundred fifty-one thousand, eight hundred fifteen".